Table of Contents
| Manufacturer | Mitsumi / Newtronics |
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|---|---|---|---|---|---|
| Model | D509V3 | ||||
| Density | HD, DD/2D | ||||
| Sides | DS/2S, SS/1S | ||||
| Rotation speed | 300, 360 | ||||
| Maximum seekable tracks | 84 | ||||
| Interface | Shugart (PC-AT compatible) |
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| Data Connnector | 34 position card edge | ||||
| Power Connnector | 4 pin Molex | ||||
| Head movement | Leadscrew | ||||
| Head loading | Mechanical | ||||
| Disk loading | Lever | ||||
| Known colors |
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Mitsumi/Newtronics D509V3
The D509V3 is a 5.25“ double sided high density floppy drive made by Mitsumi and Newtronics. It uses a leadscrew to facilitate head movement and locks the disk with a lever. Head loading is done with via mechanical linkage.
It uses the MEC 3v0 control board and the Mitsumi 69-3147 motor board.
Pictures
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Jumper settings
MEC 3V0
Common issues
Broken solder joints on power connector
The solder joints of the power connector can break over time and after repeated plugging and unplugging.
This causes problem with power delivery to the drive resulting in abnormal behaviour.
To fix this issue the solder joint have to be simply re-soldered.